Possibly shingles. If the patches are in a line-like pattern (as opposed to a random pattern), it is likely you have shingles (reactivation of chicken pox virus), and you need a prescription for an antiviral medication if the rash began within the past 3 days. Sometimes a steroid such as Hydrocortisone or Prednisone is also prescribed. The yeast infection can be treated with an antifungal medication. See your pcp.

?shingles. If the blisters are on one side only and are on the same level in the front and back, this could be herpes zoster(shingles) rather than allergic reactions or yeast.. Have your md check this.
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There . There are many possible source of your "rash".
Allergic reaction: could you be sensitive to the material or elastic in a swimsuit, panties, shorts or pants? If so, an antihistimene tablet would help (benadryl, claritin, (loratadine) zyrtec)
yeast: typically red with well defined borders, and a hazy white surface. May or may not have clumpy-white discharge. You can try any of the yeast preparations.
Irritant: extremely itchy and red. Try an anti-itch cream (outside only). The drug stores have 1% hydrocortisone.
Good luck.
Read more...

?shingles. If the blisters are on one side only and are on the same level in the front and back, this could be herpes zoster(shingles) rather than allergic reactions or yeast.. Have your md check this.
Read more...

There . There are many possible source of your "rash".
Allergic reaction: could you be sensitive to the material or elastic in a swimsuit, panties, shorts or pants? If so, an antihistimene tablet would help (benadryl, claritin, (loratadine) zyrtec)
yeast: typically red with well defined borders, and a hazy white surface. May or may not have clumpy-white discharge. You can try any of the yeast preparations.
Irritant: extremely itchy and red. Try an anti-itch cream (outside only). The drug stores have 1% hydrocortisone.
Good luck.
Read more...